GENEVA — The World Trade Organization ordered Monday the United States to halt unfair subsidies and tax breaks to planemaker Boeing, judging them to have damaged European rival Airbus. The WTO’s Appellate Body said that it found that...

A widening split in the global aviation industry over an unpopular European carbon tax may trigger a trade war, the head of plane manufacturer Airbus said Monday. “I have to say I’m really worried also as a manufacturer about the...